swift中的runAction，make对象遵循一条路径

Question

I'm trying to make an object follow a circular path every time I press a button, but it gives me an error in the last line that says UIImageView does not have a member named runAction . I already tried with .addAnimation but it still won't work.

let path = CGPathCreateMutable()
let circle = UIBezierPath(roundedRect: CGRectMake(0, 0, 100, 100), cornerRadius: 100)
let followCircle = SKAction.followPath(circle.CGPath, asOffset: true, orientToPath: false, duration: 5.0)
blueDot.runAction(SKAction(followCircle))

Answer 1

Solely based on the short code snippet and on the fact that

'UIImageView' does not have a member named 'runAction'

I would say that the object blueDot is an UIImageView object and according to the docs , it doesn't have runAction method. Probably you have mistakenly assigned an UIImageView to that variable instead of SKNode or one of its subclasses. You should probably check if that is so and fix the issue by assigning a proper SKNode object to it.